Can you disable dislike a forum post?

There is no dislike, only like.  You can remove a like, but only after liking.

Patrick M.  My apologies, I did type that incorrectly. Alex Nassi  is correct, I meant disabling the downvote rather than "dislike" . 

The option would be to modify the widget and hide the voting.   For your case voting has little value, you should just use like which describes your scenario.

The option would be to modify the widget and hide the voting.   For your case voting has little value, you should just use like which describes your scenario.